Answer:
max height = 473.68 m
velocity hit mars = 60 m/s
Explanation:
Maximum height can be found by finding the 1st derivative of s(t) and equate it to zero.
s'(t) = ds/dt = 60 - 3.8t
s't() = 0
60 - 3.8t = 0
3.8t = 60
t = 60/3.8 = 15.79
subs t = 15.79 to s(t)
s(15.79) = 60(15.79) - 1.9(15.79)^2 = 473.68 m
b) The arrow will hit mars after it went up to the maximum height and travelled back downward due to gravity
Assuming the gravity constant, the velocity when it hit the ground should be the same as it leaves the ground. To confirm that, we tested with the equation of motion.
Since there is no gravity given, let a downward as g
v^2 = u^2 + 2as
The arrow shot upward will comes back downward. Since gravity is always constant, the time it took back to reach the ground should be the same as it goes up to max height
so, t = 2*15.79 = 31.58 s
s = 0 since we are looking at the moment it touches back the ground
v^2 = u^2 +2as
v^2 = 60^2 + 2g(0)
v^2 = 60^2
v = 60 m/s
Once you get above a certain point in the atmosphere, the temperature skyrockets, since there is no atmosphere to absorb/reflect the heat from the sun. However, even if you were to somehow go outside at this elevation in shorts and a tank-top, you wouldn't feel the heat, since at that elevation, the air molecules are so far apart that the speed at which they are moving is cancelled out by the distance apart that they are.
Hope that helped! =)
Answer:
to help people breach in fresh air
Explanation:
Sunlight is an example of EM waves. Other examples
include radio waves, microwaves, and X-rays. I hope this helps.
The concept required to solve this problem is quantization of charge.
First the number of electrons will be calculated and then the total mass of the charge.
With these data it will be possible to calculate the percentage of load in the mass.
Here Q is the charge, n is the number of electrons and e is the charge on the electron
Replacing,
According to the quantization of charge the charge is defined as product of the number of electron and the charge on the electron
The total mass of the charge is
Here,
m = Mass of the charge
n = Number of electrons
= Mass of the electron
Replacing we have